Danaiku (Danai Valley) is in the catchment area of the upper reaches of the Zengwen River. Taiwan Shoveljaw Carp are abundant in this river. In the past, outsiders would use incorrect means, such as electrification, to capture the fish. They also introduced chemicals. This destroyed the natural ecology of the stream. In 1989, under the initiative of a former township mayor, a conservation team and river protection committee were formed. Local villagers formed river patrol teams to stop the illegal activities. After several years of hard work, the Danai Valley Creek became cleaner and schools of fish became clearly visible. The natural ecology of the creek has been restored.
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